2 tan2 45° + cos2 30°-sin60°.

1.	2 tan2 45° + cos2 30°-sin60°.
Answer» We KNOW that tan45∘=1,cos30∘=23,sin60∘=23 ∴2tan245∘+cos230∘−sin260∘ =2(1)2+(23)2−(23)2=2(1)=2 ∴2tan245∘+cos230∘−sin260∘=2

Answer»

We KNOW that

tan45∘=1,cos30∘=23,sin60∘=23

∴2tan245∘+cos230∘−sin260∘

=2(1)2+(23)2−(23)2=2(1)=2

∴2tan245∘+cos230∘−sin260∘=2

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2 tan2 45° + cos2 30°-sin60°.​

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2 tan2 45° + cos2 30°-sin60°.